Reduce logging verbosity by default to ERROR

This is probably not the best way to disable logging spam. It'll be changed if there is a better solution.

Change-Id: Ie4af4a8897c109c364ea65745c55105c6d88485b
Add workarounds for apparent clang bugs

For reasons yet to be debugged, clang 3.4 can't resolve
Arena::kDefaultSize and kIndexUnresolved in the 2 locations.

The workaround is to copy in their values instead.
This should be reverted once clang is fixed (or an
issue in the code legitimately blocking clang from
seeing the symbols has been found and fixed).

Change-Id: Ic392de1829a44215299aee78dfe26378b0b3bef4
Signed-off-by: Bernhard Rosenkränzer <Bernhard.Rosenkranzer@linaro.org>

Conflicts:
	compiler/dex/quick/dex_file_method_inliner.cc